Maybe I should state this more clearly so I don't confuse everyone. On my driver is a dip switch chart which shows what position to place the dip switches for different micro steps. Example, my driver does not give fractional values. It will state, when placing switches 5, 6, 7, 8 in the on, on, on, off position, this will equal = 400 pulses/rev. It does not show on, on, on, off = 1/2 micro stepping. I am assumingthat they mean the same thing and the above formula is correct. any comments